Math Quiz

Estimate each sum or difference. Which of the following is the correct estimate for 3.77 + 1.39?

• 5.16

• 5.1

• 5.2

• 5.3

Evaluate the expression: 1.4 · 27

• 37.8

• 38.0

• 36.9

• 39.2

Without doing the computation, explain why or why not 14.766 is a reasonable value for the expression 3.21 · 0.46.

• Yes, because the product of two numbers is always greater than each of the numbers.

• No, because the product of two numbers less than 1 is always less than each of the numbers.

• No, because the product of a number greater than 1 and a number less than 1 is always less than the greater number.

• Yes, because the product of a number greater than 1 and a number less than 1 is always greater than the lesser number.

Without doing the computation, explain why or why not 19.7 is a reasonable value for the expression 122.14 ÷ 6.2.

• Yes, because 19.7 is close to the actual result.

• No, because 19.7 is too high.

• No, because 19.7 is too low.

• Yes, because 19.7 is exactly the result.

Three people bought books for a total of $12.42. If they shared the cost equally, how much did each person pay?

• $6.21

• $4.14

• $4.00

• $4.52

Corey earns $9.50 per hour for the first 40 hours he works in a week. For any hours over 40 hours per week, his hourly rate is multiplied by 1.5. How much does he earn if he works 43.5 hours in one week?

• $427.75

• $456.25

• $475.00

• $490.50

Carrie has a 10-ft plank of wood. She wants to cut 3 pieces that are each 2 2/3 feet long from the plank. How long will the plank be after she cuts off the three pieces?

• 2 feet

• 1 foot

• 3 feet

• 4 feet

What is the average height of Gary, Gino, and Gilbert if Gary is 61 1/2 inches tall, Gino is 56 1/2 inches tall, and Gilbert is 63 1/8 inches tall?

• 60 inches

• 60 1/2 inches

• 60 3/4 inches

• 61 inches

In which situation might it be preferable to compute with decimals rather than fractions?

• When dealing with precise measurements in scientific calculations

• When working with repeating decimals

• When simplifying complex algebraic expressions

• When performing basic arithmetic operations

Evaluate the expression: 5.5 · 4

• 22.0

• 20.0

• 21.5

• 23.0